Analog Devices Inc./Maxim Integrated MAX25232ATCA/V+T

Overview

The MAX25232ATCA/V+T from Maxim Integrated is a 36V, 3A synchronous buck converter with integrated high-side and low-side MOSFETs, delivering ±2% output voltage accuracy in FPWM mode across 6V–18V input range, 2.1MHz fixed switching frequency, and 3.5µA quiescent current at no load-designed for automotive power rails requiring AEC-Q100 qualification and 40V load-dump protection.

For engineers reviewing the MAX25232ATCA/V+T datasheet, MAX25232ATCA/V+T pinout, MAX25232ATCA/V+T application, or MAX25232ATCA/V+T equivalent, key selection criteria include its 99% dropout duty cycle, PGOOD monitoring capability, spread-spectrum EMI reduction via SPS pin, and compatibility with compact 3mm × 3mm TDFN-EP packaging for space-constrained automotive ECUs and industrial controllers.

Technical Context

This device implements a current-mode control architecture with internal slope compensation, eliminating need for external compensation. It supports forced-PWM (FPWM) and pulse-skipping modes via SYNC pin configuration, enabling stable regulation under light loads while maintaining tight output accuracy.

Its 65ns minimum on-time enables high step-down ratios (e.g., 24V-to-3.3V), and the integrated 5V bias LDO powers internal circuitry after soft-start. Thermal shutdown triggers at 175°C with 15°C hysteresis, and overcurrent protection limits peak inductor current to 3.5A (typ) with ±12% tolerance.

Key Specifications

Pinout & Package

MAX25232ATCA/V+T is housed in a thermally enhanced 12-pin TDFN package (3mm × 3mm) with exposed pad (EP), optimized for high-power density and thermal dissipation in automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Compared with LM61480RQWR and TPS543320RHLR, the MAX25232ATCA/V+T uniquely combines AEC-Q100 Grade-1 qualification, 3.5µA IQ, 40V load-dump tolerance, and 36V max input in a 3mm × 3mm package-making it the only drop-in solution for automotive 5V rails where ultra-low standby power and transient robustness are mandatory.

Availability

MAX25232ATCA/V+T is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and high-voltage sensor nodes requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.

Supply support for MAX25232ATCA/V+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.

The MAX25232 product line delivers compact, AEC-Q100-qualified buck converters targeting automotive power rails where ultra-low IQ, high input voltage, and EMI robustness are essential-especially in body electronics, ADAS, and infotainment systems.

FAQ

What is the output voltage of the MAX25232ATCA/V+T?

The MAX25232ATCA/V+T is a factory-trimmed 5V fixed-output buck converter. Its output voltage is precisely set to 5.0V with ±2% accuracy in forced-PWM mode across the 6V–18V input range. This eliminates the need for external feedback resistors and ensures consistent performance across temperature and load conditions for the MAX25232ATCA/V+T.

Does the MAX25232ATCA/V+T support spread-spectrum frequency modulation?

Yes, the MAX25232ATCA/V+T supports spread-spectrum modulation via the SPS pin. When SPS is pulled high, the internal 2.1MHz oscillator frequency varies by ±3%, reducing peak radiated EMI emissions. This feature is active only when the device operates using its internal clock-not when synchronized externally via the SYNC pin-making it effective for automotive EMC compliance testing of the MAX25232ATCA/V+T.

What package type does the MAX25232ATCA/V+T use?

The MAX25232ATCA/V+T uses a 12-pin TDFN package with an exposed pad (TD1233+2C), measuring 3mm × 3mm. The exposed pad must be soldered to a PCB ground plane for thermal management and electrical integrity. This compact, thermally enhanced package supports high-power-density designs required in automotive and industrial applications for the MAX25232ATCA/V+T.

Is the MAX25232ATCA/V+T qualified for automotive applications?

Yes, the MAX25232ATCA/V+T is AEC-Q100 qualified (Grade-1), rated for operation from -40°C to +125°C junction temperature. It includes 40V load-dump protection, undervoltage lockout with hysteresis, thermal shutdown at 175°C, and robust EMI mitigation-meeting stringent reliability and safety requirements for automotive power supplies in the MAX25232ATCA/V+T.

How does the MAX25232ATCA/V+T handle dropout conditions?

The MAX25232ATCA/V+T operates in dropout by sustaining up to 99% duty cycle, allowing regulation even when input voltage approaches output voltage (e.g., 5.5V → 5V). During dropout, the BST capacitor is periodically recharged via brief LSFET conduction, maintaining gate drive integrity. This behavior ensures uninterrupted power delivery in automotive start-stop scenarios for the MAX25232ATCA/V+T.